Just wanted to share that I submitted an Apple DTS ticket about iOS 18.4 breaking popoverTip/TipKit and they have acknowledged it and confirmed that "it is a known issue for which there is no known workaround at this time."

This is what I had sent them along with an MRE:

There are two issues that I am noticing with my tips in iOS 18.4. These issues were not present prior to updating to iOS 18.4. To be clear, if you run on a iOS 18.2 device, simulator, or in Swift Previews, you do not see these issues.

1. The message Text is truncated. It is not allowed to wrap around anymore.
2. Subsequent tips shown in my TipGroup are presented in a sheet. The tip has no arrow and, interestingly, the text is not truncated here.